(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "IS 902: Suction Hose Couplings for Fire Fighting Purposes--Specification (Third Revision)"

**************** 




Disclosure to Promote the Right To Information 

Whereas the Parliament of India has set out to provide a practical regime of right to 
information for citizens to secure access to information under the control of public authorities, 
in order to promote transparency and accountability in the working of every public authority, 
and whereas the attached publication of the Bureau of Indian Standards is of particular interest 
to the public, particularly disadvantaged communities and those engaged in the pursuit of 
education and knowledge, the attached public safety standard is made available to promote the 
timely dissemination of this information in an accurate manner to the public. 




Mazdoor Kisan Shakti Sangathan 
"The Right to Information, The Right to Live'' 



IS 902 (1992, Reaffirmed 2002) : Suction Hose Couplings for 
Fire Fighting Purposes--Specif ication (Third Revision) . UDC 
614.823.25 : 621.643.415 




Jawaharlal Nehru 
'Step Out From the Old to the New" 



aj^&vi iJii^s:y%K^ isb^^ni^seg 



:<>5&i| mT'5K^5?::5:^>^i»l 



K^^^iXSVCd^ 



Satyanarayan Gangaram Pitroda 
Invent a New India Using Knowledge 



Bhartrhari — Nitisatakam 
''Knowledge is such a treasure which cannot be stolen" 




^'^^^r 



k 




18 302:1392 

REAFFIRMED ' 

3Tf^ ^?T?f ^^ ^ f%tT ^q-UT 5>5f ^?T^ _ |%%fsg: 

( cft^TT 3'TTl«iTT ) 

Indian Standard 

SUCTION HOSE GOUPLINGs FOR FIRE 
FIGHTING PURPOSES — SPECIFICATION 

( Third Revision ) 



First Reprint OCTOBER 2000 
UDC 614-843-25-621 •643-415 



©BIS 1992 

BUREAU OF INDIAN STANDARDS 

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG 

NEW DELHI 110002 

October 1992 Price Groop 3 



Fire Fighting Sectional Committee, CED 22 



FOREWORD 

This Indian Standard ( Third Revision ) was adopted by the Bureau of Indian Standards, after the 
draft finalized by the Fire Fighting Sectional Committee had been approved by the Civil 
Engineering Division Council. 

The present revision is being taken up with a view to incorporating the changes required in light 
of experience gained in the field as a result of following this standard. Major changes include 
the change in a few dimensions of different components of the coupling. Only the multi-serrated 
type couplings have been retained while ribbed type have been dropped. The standard also 
refers to the latest versions of Indian Standards and hence also gives the current designations 
for the materials of various components. 

This standard permits the use of copper, copper alloys, aluminium and aluminium alloys only 
in the manufacture of couplings, and it is strongly recommended that all the components be 
made in either aluminium or its alloys and copper or its alloys as it is essential to avoid, as far 
as possible, coupling aluminium alloys to copper alloys or vice versa, particularly for long periods, 
as otherwise electrolytic action may result from the close proximity of these metals to each other. 
It is also recommended that aluminium alloy fittings be made from gravity die-castings, unless 
otherwise approved by the purchaser. On die-cast fittings, where the bore is shown as parallel, it 
is suggested that the manufacturer be allowed a reasonable taper to facilitate core withdrawal 
but this taper should be kept to the minimum required for this purpose. Other materials may 
be used with the prior approval of the purchaser provided that they have good corrosion 
resistance to all types of water, including sea water or brackish water, and there is no change of 
electrolytic action between adjacent materials. It is also essential that aluminium alloy couplings 
are thoroughly washed with fresh water immediately after use with sea water or brackish 
water* 

A separate standard IS 3549 : 1983 *Water suctioji and discharge hose of rubber heavy duty 
( second revision y has also been published in which the sizes of hose have been specified in 
metric units. 

For the purpose of deciding whether a particular requirement of this standard is complied with, 
the final value, observed or calculated, expressing the result of a test or analysis, shall be 
rounded off in accordance with IS 2 ; 1960 'Rules for rounding off numerical values ( r^v/^^rf )'. 
The number of significant places retained in the rounded off value should be the same as that of 
the specified value in this standard* 



AMENDMENT NO. 2 JULY 2009 

TO 

IS 902 : 1992 SUCTION HOSE COUPLINGS FOR FIRE 

FIGHTING PURPOSES ~ SPECIFICATION 

( Third Revision ) 

{Page 4, Table 2) — Substitute the following for the existing: 



NoniinaS 

Size of 

Coupling 


Male Coupling 


Nut for Female Coupling 


Dia£: 

(loler- 

ance 

i:0.4) 


Dia.F 
(Toler- 
ance 

iO.8) 


DiaG 

(Toler^ 

ance 

±0.8) 


Dia51 
(Toler- 
ance 
■f- 0.40 
- 0.00) 


DiaA/ 

(Toler^ 

ance 

±0.8) 


P\ 

(Toler- 
ance 

±0.8) 


D'mR 
(Toler- 
ance 

±0.8) 


Thick- 
ness 
/ (Min 
±0.8) 


DmK 
(Toler- 
ance 
+ 0.40 
-0.00) 


Dia/V 

(Toler- 

auce 

±1) 


P 
(Toler- 
ance 
±1) 


Dia^l 
(Toler- 
ance 
±1) 


(0 


(2) 


(3) 


(4) 


(5) 


(6) 


0) 


(8) 


(9) 


(10) 


(11) 


(12) 


(13) 


75 


77.80 


71.40 


89 


69,9 


95 


140 


19 


4 


93.70 


no 


170 


114 


100 


103.2 


96.80 


114 


95.3 


121 


165 


24 


4 


119.10 


137 


187 


143 


140 


141.3 


134.9 


152 


133.4 


159 


203 


24 


4 


157.20 


175 


235 


181 



(CED 22) 



Reprography Unit, BIS, New Delhi, India 



AMENDMENT NO. 1 AUGUST 2002 

TO 

IS 902 • 1992 SUCTION HOSE COUPLINGS FOR FIRE 

FIGHTING PURPOSES - SPECIFICATION 

f Third Revision ) 

( Page I, clause 5.4 ) — Substitute the following for the existing: 

''5,4 Washers 

Washers used in the couplings shall conform to IS 937 : 1981 'Specification for 

washers for water fittings for fire fighting purposes ( second revision ) . 



( CED 22 ) 



Reprography Unit, BIS, New Delhi, India 



IS 902 : 1992 



Indian Standard 



SUCTION HOSE COUPLINGS FOR FIRE 
FIGHTING PURPOSES — SPECIFICATION 

( Third Revision ) 



1 SCOPE 

1,1 This standard lays down the requirenients 
regarding material, shape and dimensions, 
construction, workmanship, and tests of 
suction hose couplings used in fire fighting 
operations. 

2 REFERENCES 

2.1 The Indian Standards listed in Annex A 
are necessary adjuncts to this standard. 

3 MATERIAL 

3,1 Castings and Forgings 

Castings and forgings shall be made of any one 
of The materials given under 3.1,1 and 3.1„2. 

3,1.1 Coppor Alloys 

Copper alloys used for castings and forgings 
shall conform to the requirements gxvtn below: 

LTB 2 of IS 318 : 1981 
Grade 3 of IS 304 : 1981 
Grade 3 of IS 292 : 1983 
Grade 1 of IS 291 : 1977 



a) Sand castings 

b) Die-castings 

c) Hot forgings 



3.1.2 Aluminium Alloys 

Aluminium alloys used for castings shall con- 
form to IS Designation 4450 WP, 4225 WP or 
4600 of IS 617 : 1975 castings shall be of die 
casting only. 

4 SHAPE AND DIMENSIONS 

4.1 The shape and dimensions of suction hose 
couplings shall conform to Fig. 1 to 7 and 
Tables 1, 2 and 3. 

5 CONSTRUCTION 

5A Couplings shall be of the locking ring 
pattern ( see Fig. 7 ) and the various parts 
shall be as shown in Fig. 1 to 5. The locking 
ring shall be secured either by pegging or screw- 
ing or by both. The tail pieces of couplings 
shall be of multi-serrated type ( see Fig. 7 ). 



5.2 Round Threads for Male Coupling and Nut 

The basic form of round threads shall be as 
shown in Pig. 6. The limits and tolerances of 
threads shall be in accordance with Table 3. 

5.3 «V' Threads for Locking Ring and Nut 

The locking ring and the nut for female coupl- 
ing shall have threads conforming to M-95x3, 
M— 120x3, M-~-160x3 of IS 4218 ( Parts 1 to 6 ) : 
1976. 

5.4 Washers 

Washers used in the couplings shall be of 
rubber conforming to requirements of hardness 
as applicable to type 3 of IS 5382 : 1985 also 
acid and alkali resistance ( see Note ) or of 
leather conforming to IS 581 : 1978. 

NOTE — V^hen a piece of 2-5 cm cut from any 
portion is dipped in 20% sulphuric acid/5% sodium 
liydroxide solution for 30 minutes, there shall be 
no sign of corrosion/damage. 




-29 



FEATHER 

EDGES-TO 
BE REMOVED 



All dimensions in millimetres. 
Fig. 1 Nut for Female Coupling 



IS 902; 1992 




6010 W 



All dimensions in millimetres. 

Fig. 2 Male Coupling 




27?1 



All dimensions in millimetres. 

Fig. 3 Female Coupling 



<P B 
- <p A 



~®j 



All dimensions in millimetres. 

Fig. 4 Washer 




3U5 CHAMFER 



<f>Q 



3mm UNDERCUT 




C SPANNER 
SLOTS EQUALLY 
SPACED 



All dimensions in millimetres. 

Fig. 5 Locking Ring 



MSB 




107 
^R2'39 

All dimensions in millimetres. 

Fig. 6 Basic Form of Round Thread 
FOR Coupling 



IS 902 t 1992 



TALE PIECE OF FEMALE COUPLING 
(MULThSERRATED TYPE) 



NUT FOR FEMALE 
COUPLING -\ 



MALE COUPLING 
(MULTI-SERRATED TYPE) 




LOCKING RING 



WASHER 



All dimensions in millimetres. 
Fig. 7 Assembly 

Table 1 Dimenstoiis ©f Tall Piece for Female Coupling and of Locking Ring 

( Clause 4.1, and Fig. 3, 5 and 7 ) 

All dimensions and tolerances in millimetres. 



Nominal 

Si2e of 

Coupling 

(1) 


Tall Piece for Female Coupling 


Locking Ring 


Dia-E 

( Tole- 
rance 
±04) 

(2) 


Dia-i^ 
( Tole- 
rance 
±0-8) 

(3) 


Dia-G? 

( Tole- 
rance 
±0-8) 

(4) 


Dia-^ 
( Tole- 
rance 
-1- 0-00 
— 0-40 ) 

(5) 


Dia-2. 
(Tole- 
rance 
+ 00 
— 0-40) 

(6) 


Thickness, 
Min 

+ 0-8 
— 

(7) 


Dia-0 

( Tole- 

ra-ice 

+ 0-40 

— 000) 

(8) 


Dia-^ 

( Tole- 

ranee 

±0-4) 

(9) 


75 


77-80 


71-40 


89 


92 


68-20 


4 


80-20 


114-3 


100 


103-20 


96-80 


114 


117-40 


936 


4 


105-70 


142-0 


140 


141.30 


134-90 


152 


155-70 


131-8 


4 


143-70 


181-0 



IS 902 s 1992 



Table 2 Dimeissions of Male Coupling and of Nut for Female Coypling 

( Clause 4.1 , and Fig. 1,1 and! ) 

All dimensions and tolerances in millimetres. 



Nominal 

Size of 
Coupling 

(1) 


Male Coupling 


Nut for Female Coupling 


Dia^E 
( Tole- 
rance 
±0-4) 

(2) 


Dia-F 

( Tole- 
rance 
±0-8 ) 

(3) 


Dia-G 
( Tole- 
rance 
±0-8) 

(4) 


Dia-Sl 
( Tole- 
rance 
+0-40 
--0-00) 

(5) 


Dia.M 
( Tole- 
rance 
±0-8) 

(6) 


PI 
(Tole- 
rance 
±0-8) 

(7) 


Dia-i? 
(Tole- 
rance 
±0-8) 

(8) 


Thick- 
ness 

/, Min 
±0-8) 

(9) 


Dia-^ 

( Tole- 
rance 
-f-0-40 
^000) 

(10) 


Dia-iST 
( Tole- 
rance 
±1) 

(11) 


P 

( Tole- 
rance 
±1) 

(12) 


Dia-^l 
( Tole- 
rance 
±1) 

(13) 


75 


77-80 


71-40 


89 


69-9 


95 


140 
165 


19 

24 


4 
4 


93-70 


110 


170 


114'3 


100 


103-20 


96-80 


114 


95-3 


121 


119-10 


137 


197 


142-9 


140 


141-30 


134-90 


152 


133-4 


159 


203 


24 


4 


157-20 


175 


235 


181 



Table 3 Limits and Tolerances of Round Threads 

( Clauses 4.1 and 5.2, and Fig, 6 ) 
Aii dimensions in millimetres. 



Nominal Size of 
Coupling 


Male Thread 


Female Thread 


Major Dia-/4 


Minor Dia-B 


Major Dia-i) 


Minor Dia-C 


(1) 


Maximum 
(2) 


Minimum 
0) 


Maximum 
(4) 


Minimum 
(5) 


Minimum 
(6) 


Maximum 

(7) 


7 


92-00 


91-60 


81-40 


93-20 


82-6 


83-0 


100 


117-40 


117-00 


106-90 


118-60 


108-0 


108-0 


140 


155-50 


15510 


144-9 


156-70 


146-1 


1461 



6 TOLERANCE 

6.1 Unless specified otherwise, the tolerances 
on machined dimensions shall conform 
to IS 2102 { Part 1 ) : 1980. 

7 WORKMANSHIP AND FINISH 

7.1 All parts of the couplings shall not have 
burrs and sharp edges. The waterway shall 
have a smooth finish. 



8 PERFORMANCE REQUIREMENTS 

8.1 Hydraulic Test 

Assembled couplings shall be subjected to 
hydraulic pressure of 21 kg/cm^ for a period of 
two minutes for the purpose of locating poro- 
sity in the castings and also to test the merits 
of the joint. The test shall be applied after 
all machining and screwing operations have 
been completed. The couplings when so tested 
shall not show any sign of leakage. 



IS 902 : 1992 



8.1.1 While assembling the suction hose coupl- 
ings for the hydraulic pressure test, only hand 
tightness is to be applied by means of coupling 
wrench. Use shall not be made of any exten- 
sion on the handle of the wrench, or any other 
means to produce excessive tightness. 

9 MARKING 

9.1 Suction hose couplings shall be clearly 



and permanently marked with the following 
information: 

a) Manufacturer's name or trade-mark, 

b) Size of coupling, and 

c) Year of manufacture. 

9.1.1 The suction hose couplings may also be 
marked with the Standard Mark. 



ANNEX A 
( Clause 2.1 ) 

LIST OF REFERRED INDIAN STANDARDS 



IS No. Title 

291 : 1989 Naval brass rods and sections 

for machining purposes ( third 
revision ) 

292 : 1983 Leaded brass ingots and cast- 

ings ( second revision ) 

304: 1981 High tensile brass ingots and 

castings ( second revision ) 

318 : 1981 Leaded tin bronze ingots and 

castings ( second revision ) 

581 : 1976 Vegetable tanned hydraulic 

leather ( second revision ) 

617 : 1975 Aluminium and aluminium 

alloy ingots and castings for 
general engineering purposes 
( second revision ) 

2102 General tolerances for dimen- 

( Part 1 ) : 1980 sions and form and position : 

Part 1 General tolerances for 



IS No. Title 

linear and angular dimensions 
( second revision ) 

4218 ISO metric screw threads ; 

( Part 1 ) : 1976 Part 1 Basic and design profiles 

( first revision ) 

( Part 2 ) : 1976 Diameter pitch combinations 
(first revision ) 

( Part 3 ) : 1976 Basic dimensions for design 
profiles ( first revision ) 

( Part 4 ) : 1976 Tolerancing system {first 
revision ) 

( Part 5 ) : 1979 Tolerances (first revision ) 

( Part 6 ) : 1978 Limits of sizes for commercial 
bolts and nuts ( diameter range 
1 to 52 mm ) ( first revision ) 

5382 : 1985 Rubber sealing rings for gas 

mains, water mains and sewers 
( first revision )